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| author | Maneesh Soni <maneesh@in.ibm.com> | 2006-01-10 05:51:52 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-10 17:01:29 +0100 |
| commit | 05970d476f2c8aa0f47e4e82473b0551b1e4e6d4 (patch) | |
| tree | 99708f3c7d8b17b994776ace981ea43208e8649d /arch/i386/Kconfig | |
| parent | [PATCH] kexec: increase max segment limit (diff) | |
| download | linux-05970d476f2c8aa0f47e4e82473b0551b1e4e6d4.tar.xz linux-05970d476f2c8aa0f47e4e82473b0551b1e4e6d4.zip | |
[PATCH] kexec: change CONFIG_PHYSICAL_START dependency
I have heard some complaints about people not finding CONFIG_CRASH_DUMP
option and also some objections about its dependency on CONFIG_EMBEDDED.
The following patch ends that dependency. I thought of hiding it under
CONFIG_KEXEC, but CONFIG_PHYSICAL_START could also be used for some reasons
other than kexec/kdump and hence left it visible. I will also update the
documentation accordingly.
o Following patch removes the config dependency of CONFIG_PHYSICAL_START
on CONFIG_EMBEDDED. The reason being CONFIG_CRASH_DUMP option for
kdump needs CONFIG_PHYSICAL_START which makes CONFIG_CRASH_DUMP depend
on CONFIG_EMBEDDED. It is not always obvious for kdump users to choose
CONFIG_EMBEDDED.
o It also shifts the palce where this option appears, to make it closer
to kexec and kdump options.
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Haren Myneni <haren@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/Kconfig')
| -rw-r--r-- | arch/i386/Kconfig | 33 |
1 files changed, 21 insertions, 12 deletions
diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index d849c6870e3a..554ce3f344c9 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -645,17 +645,6 @@ config SECCOMP source kernel/Kconfig.hz -config PHYSICAL_START - hex "Physical address where the kernel is loaded" if EMBEDDED - default "0x100000" - help - This gives the physical address where the kernel is loaded. - Primarily used in the case of kexec on panic where the - fail safe kernel needs to run at a different address than - the panic-ed kernel. - - Don't change this unless you know what you are doing. - config KEXEC bool "kexec system call (EXPERIMENTAL)" depends on EXPERIMENTAL @@ -675,11 +664,31 @@ config KEXEC config CRASH_DUMP bool "kernel crash dumps (EXPERIMENTAL)" - depends on EMBEDDED depends on EXPERIMENTAL depends on HIGHMEM help Generate crash dump after being started by kexec. + +config PHYSICAL_START + hex "Physical address where the kernel is loaded" if (EMBEDDED || CRASH_DUMP) + + default "0x1000000" if CRASH_DUMP + default "0x100000" + help + This gives the physical address where the kernel is loaded. Normally + for regular kernels this value is 0x100000 (1MB). But in the case + of kexec on panic the fail safe kernel needs to run at a different + address than the panic-ed kernel. This option is used to set the load + address for kernels used to capture crash dump on being kexec'ed + after panic. The default value for crash dump kernels is + 0x1000000 (16MB). This can also be set based on the "X" value as + specified in the "crashkernel=YM@XM" command line boot parameter + passed to the panic-ed kernel. Typically this parameter is set as + crashkernel=64M@16M. Please take a look at + Documentation/kdump/kdump.txt for more details about crash dumps. + + Don't change this unless you know what you are doing. + endmenu |